Wednesday, September 3rd, 2014

Evolution Quiz 1. Get out a clean sheet of paper 2. Put your STUDENT ID, not your name, on the top. Also Include the date 3. Title this, “Evolution Quiz”

Evolution Quiz 1. List the four key components of natural selection. 2. Define evolution. 3. What were the two principles in Lamarck’s hypothesis for evolution. Although his hypothesis was not supported, what was one good aspect of his work?

Evolution Quiz Answers 1. List the four key components of natural selection. Individuals in a population vary in traits These traits are heritable Species can produce more offspring than the environment can support OR there are limited resources in the population Some individuals survive and reproduce at higher rates than others 4 points max

Evolution Quiz 2. Define evolution. The change in genetic composition in a population from generation to generation 2 points max…if some of it was right, give 1 point

Evolution Quiz Answers 3. What were the two principles in Lamarck’s hypothesis for evolution. Although his hypothesis was not supported, what was one good aspect of his work? They are: use and disuse of body parts and the inheritance of acquired characteristics (2 points max) He provided a mechanistic explanation for how evolution could occur (1 point) 3 points possible

Exit ticket To the right is a picture of a population of Asian ladybird beetles. They vary in spot number and color. Question: Under what conditions would natural selection act on the color and spot number of beetles in this population? Your job is to convince me in your defense.

Homework: Complete the assigned question set on your MasteringBiology course page. The assignment will close at midnight Make sure you have your student ID entered with your name Make sure you have an account. If not, let me know today!! Below is the site address. http://www.pearsonmylabandmastering.com/northamerica/masteringbiology/ Speaking of website, make sure you add the course wiki site to your bookmarks! http://drcaobiology.cmswiki.wikispaces.net/

Key terms so far Evolution Natural Selection Adaptation- an inherited trait that enhances the survival & reproduction of an individual in a specific environment

(a) A flower mantid in Malaysia (b) A leaf mantid in Borneo Figure 22.12 Figure 22.12 Camouflage as an example of evolutionary adaptation. (a) A flower mantid in Malaysia (b) A leaf mantid in Borneo

Evidences for evolution

Soapberry bug with beak inserted in balloon vine fruit Figure 22.13a FIELD STUDY Figure 22.13 Inquiry: Can a change in a population’s food source result in evolution by natural selection? Soapberry bug with beak inserted in balloon vine fruit

On native species, southern Florida Figure 22.13b RESULTS Beak 10 On native species, southern Florida 8 6 4 2 Number of individuals Museum-specimen average 10 8 On introduced species, central Florida Figure 22.13 Inquiry: Can a change in a population’s food source result in evolution by natural selection? 6 4 2 6 7 8 9 10 11 Beak length (mm)

The Evolution of Drug-Resistant Bacteria The bacterium Staphylococcus aureus is commonly found on people One strain, methicillin-resistant S. aureus (MRSA) is a dangerous pathogen S. aureus became resistant to penicillin in 1945, two years after it was first widely used S. aureus became resistant to methicillin in 1961, two years after it was first widely used

Anatomical and Molecular Homologies Homologous structures are anatomical resemblances that represent variations on a structural theme present in a common ancestor

Humerus Radius Ulna Carpals Metacarpals Phalanges Human Cat Whale Bat Figure 22.15 Humerus Radius Ulna Carpals Metacarpals Figure 22.15 Mammalian forelimbs: homologous structures. Phalanges Human Cat Whale Bat

1. Solve it! Directions: On a separate sheet of paper, add your name and date. Title this as, “Natural Selection Practice”. Work on this by yourself. You will hand this in for a grade. Mosquitoes resistant to the pesticide DDT first appeared in India in 1959, but now are found throughout the world. A) graph the data in the table below. B) Examining the graph, hypothesize why the percentage of mosquitoes resistant to DDT rose rapidly. C) Suggest an explanation for the global spread of DDT resistance. Month Mosquitoes resistant to DDT 4% 8 45% 12 77%

Month Mosquitoes resistant to DDT 4% 8 45% 12 77%

2. Solve it! You went to the doctor because you have an upper respiratory infection. You were given antibiotics. Why is it so important that you finish all of the medication?

Exit Ticket- put your name and date on it 1. Describe two examples that provide evidence for evolution.